FIX: use hidden setting for max export file size

config/site_settings.yml

@@ -869,6 +869,10 @@ files:
     default: 40
     min: 5
     max: 150
+  max_export_file_size_kb:
+    hidden: true
+    default: 50000
+    max: 1024000
   theme_authorized_extensions:
     default: 'jpg|jpeg|png|woff|woff2|svg|eot|ttf|otf|gif'
     type: list

lib/validators/upload_validator.rb

@@ -113,7 +113,11 @@ class Validators::UploadValidator < ActiveModel::Validator
   end
 
   def maximum_file_size(upload, type)
-    max_size_kb = SiteSetting.send("max_#{type}_size_kb")
+    max_size_kb = if upload.for_export
+      SiteSetting.max_export_file_size_kb
+    else
+      SiteSetting.send("max_#{type}_size_kb")
+    end
     max_size_bytes = max_size_kb.kilobytes
 
     if upload.filesize > max_size_bytes

spec/components/validators/upload_validator_spec.rb

@@ -20,9 +20,14 @@ describe Validators::UploadValidator do
     it "allows 'gz' as extension when uploading export file" do
       SiteSetting.authorized_extensions = ""
 
-      created_upload = UploadCreator.new(csv_file, "#{filename}.gz", for_export: true).create_for(user.id)
+      expect(UploadCreator.new(csv_file, "#{filename}.gz", for_export: true).create_for(user.id)).to be_valid
-      expect(created_upload).to be_valid
     end
 
+    it "allows uses max_export_file_size_kb when uploading export file" do
+      SiteSetting.max_attachment_size_kb = "0"
+      SiteSetting.authorized_extensions = "gz"
+
+      expect(UploadCreator.new(csv_file, "#{filename}.gz", for_export: true).create_for(user.id)).to be_valid
+    end
   end
 end